别浪费时间让Python去适应你在其他语言中学到的模式。尽管Python的简单性可迅速提高你的工作效率，但这往往意味着你并未运用该语言所提供的所有特性。通过这本实践指南的更新版，你将学会如何利用最佳理念来编写有效的现代Python 3代码。
发现并应用超出你过往经验之外的Python 3惯用特性。作者Luciano Ramalho将带你了解Python的核心语言特性和库，并教你如何使代码更短、更快、更具可读性。
新版进行了重大的更新，共包含五部分，每部分都相当于一本迷你书：
数据结构：序列、字典、集合、Unicode和数据类。
作为对象的函数：头等函数、相关设计模式和函数声明中的类型提示。
面向对象的惯用法：组合、继承、mixin、接口、运算符重载、协议和更多静态类型。
控制流：上下文管理器、生成器、协程、async／await和线程／进程池。
元编程：属性、特性描述符、类装饰器以及替代或简化元类的新类元编程钩子。

卢西亚诺·拉马略，1998开始成为Python程序员，是Python软件基金会的会员，巴西培训公司Python.pro.br的共同所有人，巴西第一家黑客空间Garoa Hacker Clube的联合创始人。他领导过软件开发团队，并在巴西的媒体、银行和政府部门教授过Python课程。

Preface
Part I. Data Structures
1. The Python Data Model
What's New in This Chapter
A Pythonic Card Deck
How Special Methods Are Used
Emulating Numeric Types
String Representation
Boolean Value of a Custom Type
Collection API
Overview of Special Methods
Why len Is Not a Method
Chapter Summary
Further Reading
2. An Array of Sequences
What's New in This Chapter
Overview of Built-In Sequences
List Comprehensions and Generator Expressions
List Comprehensions and Readability
Listcomps Versus map and filter
Cartesian Products
Generator Expressions
Tuples Are Not lust Immutable Lists
Tuples as Records
Tuples as Immutable Lists
Comparing Tuple and List Methods
Unpacking Sequences and Iterables
Using * to Grab Excess Items
Unpacking with in Function Calls and Sequence Literals
Nested Unpacking
Pattern Matching with Sequences
Pattern Matching Sequences in an Interpreter
Slicing
Why Slices and Ranges Exclude the Last Item
Slice Objects
Multidimensional Slicing and Ellipsis
Assigning to Slices
Using + and * with Sequences
Building Lists of Lists
Augmented Assignment with Sequences
A += Assignment Puzzler
list.sort Versus the sorted Built-In
When a List Is Not the Answer
Arrays
Memory Views
NumPy
Deques and Other Queues
Chapter Summary
Further Reading
3. Dictionaries and Sets
What's New in This Chapter
Modern dict Syntax
dict Comprehensions
Unpacking Mappings
Merging Mappings with 丨
Pattern Matching with Mappings
Standard API of Mapping Types
What Is Hashable
Overview of Common Mapping Methods
Inserting or Updating Mutable Values
Automatic Handling of Missing Keys
defaultdict: Another Take on Missing Keys
The missing__ Method
Inconsistent Usage of__missing__ in the Standard Library
Variations of dict
……
Part II. Functions as Objects
Part III. Classes and Protocols
PartIV. ControIFIow
Part v. Metaprogramming
Afterword
Index